Laser-tracking interferometer system based on trilateration and a restriction on the position of its laser trackers

Toshiyuki Takatsuji; Yoshihiko Koseki; Mitsuo Goto; Tomizo Kurosawa; Yoshihisa Tanimura

doi:10.1117/12.316463

6 July 1998 Laser-tracking interferometer system based on trilateration and a restriction on the position of its laser trackers

Toshiyuki Takatsuji, Yoshihiko Koseki, Mitsuo Goto, Tomizo Kurosawa, Yoshihisa Tanimura

Author Affiliations +

Proceedings Volume 3479, Laser Interferometry IX: Applications; (1998) https://doi.org/10.1117/12.316463
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

To measure three dimensional coordinate we have been developing a laser tracking interferometer system (LTS). Four laser interferometers chase the movement of a target cat's eye and measure the change in distance between them. The position of the cat's eye is determined from the measured distances based on the principle of trilateration. Taking advantage of measurement redundancy produced by the fourth tracker, the position of the trackers and the initial position of the cat's eye can be estimated by a self-calibration algorithm. A restriction on the arrangement of the laser trackers to perform the self-calibration algorithm is theoretically studied. Finally a preliminary experiment was made to show the measurement error of about 40 micrometers for a 1 m measurement.

Citation Download Citation

Toshiyuki Takatsuji, Yoshihiko Koseki, Mitsuo Goto, Tomizo Kurosawa, and Yoshihisa Tanimura "Laser-tracking interferometer system based on trilateration and a restriction on the position of its laser trackers", Proc. SPIE 3479, Laser Interferometry IX: Applications, (6 July 1998); https://doi.org/10.1117/12.316463

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